Secondary combustion furnace with combustion speed adjustment function

ABSTRACT

The present disclosure discloses a secondary combustion with a combustion speed adjustment function, including an outer barrel and an inner barrel; the inner barrel is provided with a combustion cavity; the outer barrel is provided with a first air inlet hole; the inner barrel is provided with a second air inlet hole; a ventilation clearance is reserved between the inner barrel and the outer barrel; a waste tray is arranged in the ventilation clearance; a plurality of third air inlet holes are arranged above the combustion cavity; an adjustment valve is arranged at a lower end of the outer barrel; and supporting legs are arranged on a lower end surface of the outer barrel.

TECHNICAL FIELD

The present disclosure relates to the field of combustion furnaces, in particular to a secondary combustion furnace with a combustion speed adjustment function.

BACKGROUND

In some districts, for some special purposes, stoves are still used. Currently used stoves are all fueled by coal blocks and wood, which are limited resources. Due to the fact that existing stoves are designed to obtain heat energy by primary combustion of a single tile, smoke generated during the primary combustions of the coal blocks and wood is directly discharged by a chimney. This primary combustion manner is a waste of resources and also adds pollution emission to the atmosphere, which is not conducive to existing practical requirements of energy conservation and emission reduction.

Later, there are secondary combustion furnaces with better combustion efficiency, such as CN104421969A, CN105571123A, and CN106509968A. However, these combustion furnaces still have shortcomings. Specifically, these combustion furnaces are too complex in structure and difficult to implement. Due to an insufficient temperature of gas for secondary combustion of gas, the secondary combustion efficiency is also not high enough. At the same time, these secondary combustion furnaces do not have a function of adjusting a combustion speed of fuels.

Therefore, it is necessary to study a new technical solution to solve the above problems.

SUMMARY

In order to solve the defects and shortcomings in the prior art, the present disclosure provides a secondary combustion furnace with a combustion speed adjustment function. A ventilation clearance is arranged in the combustion furnace; an air inlet hole communicated with the ventilation clearance is formed above a combustion cavity, thereby achieving secondary combustion of combustibles in the combustion furnace. In the structure of the present disclosure, the combustion furnace also has a heating effect on the air in the ventilation clearance. Meanwhile, due to an adjustment valve, a combustion speed of the combustibles in the combustion furnace can be adjusted. Compared with the prior art, the combustion furnace of the present disclosure has higher combustion efficiency, has a combustion speed adjustment function, and is more suitable for being popularized and used.

In order to achieve the above-mentioned objective, the present disclosure adopts the following technical solution:

A secondary combustion furnace with a combustion speed adjustment function includes an outer barrel and an inner barrel arranged in the outer barrel; the inner barrel is provided with a combustion cavity; the outer barrel is provided with a first air inlet hole in a lower end surface; a second air inlet hole corresponding to the first air inlet hole is formed in a lower end surface of the inner barrel; a ventilation clearance is reserved between the inner barrel and the outer barrel; a waste tray is arranged on a lower side of the ventilation clearance corresponding to the inner barrel; a plurality of third air inlet holes communicated with the ventilation clearance are arranged above the combustion cavity; an adjustment valve corresponding to the first air inlet hole and used for adjusting a size of the first air inlet hole is arranged at a lower end of the outer barrel; and supporting legs are arranged on a lower end surface of the outer barrel.

As a preferred solution, the outer barrel is provided with an inner cavity; the inner barrel is placed in the outer barrel; a first stop ring is arranged above the inner cavity; an upper end of the inner barrel extends to an outer side to form a second stop ring matched with the first stop ring; the secondary combustion furnace further includes a furnace cover; and the furnace cover is covered at an upper side of the second stop ring.

As a preferred solution, the first stop ring is lower than an upper end surface of the outer barrel, and forms an outer stop ring; and the furnace cover is covered in a region encircled by the outer stop ring.

As a preferred solution, the furnace cover is provided with an upper-end smoke outlet; the furnace cover is further provided with a smoke guide portion corresponding to the smoke outlet; and the smoke guide portion is an upwards retracted guide slope.

As a preferred solution, the outer barrel and the inner barrel are both cylindrical; and the plurality of third air inlet holes are circumferentially arranged along a circle center of the inner barrel.

As a preferred solution, the supporting legs are arranged on a front end surface of the outer barrel in a retractable manner, and there are three or more supporting legs.

As a preferred solution, the adjustment valve is a rotating piece rotatably connected to the lower end surface of the outer barrel; the rotating piece is provided with a fourth air inlet hole corresponding to the first air inlet hole; and the rotating piece integrally extends to form a rotating portion.

As a preferred solution, an outer side wall of the outer barrel is connected with a lifting handle.

Compared with the prior art, the present disclosure has significant advantages and beneficial effects. Specifically, it can be known from the above technical solutions that first, the ventilation clearance is arranged in the combustion furnace; the air inlet holes communicated with the ventilation clearance are formed above the combustion cavity, thereby achieving secondary combustion of combustibles in the combustion furnace. In the structure of the present disclosure, the combustion furnace also has a heating effect on the air in the ventilation clearance. Meanwhile, due to the adjustment valve, a combustion speed of the combustibles in the combustion furnace can be adjusted. Compared with the prior art, the combustion furnace of the present disclosure has higher combustion efficiency, has a combustion speed adjustment function, and is more suitable for being popularized and used.

Second, the specific design of the adjustment valve, the supporting legs, and the like also further improves the applicability of the combustion furnace of the present disclosure.

In order to describe the structural features and effects of the present disclosure more clearly, the present disclosure is described in detail below in combination with the accompanying drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a first three-dimensional diagram of an embodiment of the present disclosure;

FIG. 2 is a second three-dimensional diagram of an embodiment of the present disclosure;

FIG. 3 is a third three-dimensional diagram of an embodiment of the present disclosure;

FIG. 4 is a bottom view of an embodiment of the present disclosure;

FIG. 5 is a schematic sectional diagram of an embodiment of the present disclosure;

FIG. 6 is a partially enlarged diagram of a portion A in FIG. 5 ;

FIG. 7 is a partially enlarged diagram of a portion B in FIG. 5 ;

FIG. 8 is an exploded diagram of an embodiment of the present disclosure; and

FIG. 9 is a schematic diagram of a working principle of an embodiment of the present disclosure.

Numerals in the drawings:

10: outer barrel; 11: first air inlet hole; 12: ventilation clearance; 13: first stop ring; 14: outer stop ring; 15: lifting handle; 20: inner barrel; 21: second air inlet hole; 22: third air inlet hole; 23: second stop ring; 30: waste tray; 40: adjustment valve; 41: rotating portion; 42: fourth air inlet hole; 50: supporting leg; 60: furnace cover; 61: smoke guide portion; and 70: combustible.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only preferred embodiments of the present disclosure.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or an intermediate element may also exist. When one element is considered to be “connected” to another element, it can be directly connected to another element or there may be a central element at the same time. The terms “perpendicular”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only, and are not meant to be the only implementation modes.

Unless otherwise defined, all technical and scientific terms used herein are the same as meanings of general understandings of those skilled in the art of the present disclosure. The terms used in the description of the present disclosure herein are merely to describe the specific implementation modes, not intended to limit the present disclosure. The term “and/or” used herein includes any and all combinations of one or more related listed items.

Referring to FIG. 1 to FIG. 9 , a secondary combustion furnace with a combustion speed adjustment function in this embodiment of the present disclosure includes an outer barrel 10 and an inner barrel 20 arranged in the outer barrel 10. The inner barrel 20 is provided with a combustion cavity. The outer barrel 10 is provided with a first air inlet hole 11 in a lower end surface. A second air inlet hole 21 corresponding to the first air inlet hole 11 is formed in a lower end surface of the inner barrel 20. A ventilation clearance 12 is reserved between the inner barrel 20 and the outer barrel 10. A waste tray 30 is arranged on a lower side of the ventilation clearance 12 corresponding to the inner barrel 20. A plurality of third air inlet holes 22 communicated with the ventilation clearance 12 are arranged above the combustion cavity. An adjustment valve 40 corresponding to the first air inlet hole 11 and used for adjusting a size of the first air inlet hole 11 is arranged at a lower end of the outer barrel 10. Supporting legs 50 are arranged on a lower end surface of the outer barrel 10.

During use, combustibles (firewood) can be placed in the combustion cavity. External air enters the ventilation clearance 12 from the first air inlet hole 11. The air of the ventilation clearance 12 enters the bottom and top of the combustion cavity from the second air inlet hole 21. In a combustion process of the combustibles at the bottom of the combustion cavity, incompletely burned combustible particles are produced. These combustible particles move upward together with smoke. In the upward movement process, the combustible particles are in contact with air (with a high temperature) entering from the second air inlet hole 21, and secondary combustion occurs, thereby improving the combustion efficiency of the combustibles (firewood). It should be noted that due to the specific design of the combustion furnace of the present disclosure, in a process that external air enters the third air inlet holes 22 via the ventilation clearance 12, the air also absorbs heat from a wall of the inner barrel 20 and becomes air with a higher temperature. Thus, the incompletely burned combustible particles are combusted more fully.

Specifically, the outer barrel 10 and the inner barrel 20 are both cylindrical; and the plurality of third air inlet holes 22 are circumferentially arranged along a circle center of the inner barrel 20. The outer barrel 10 is provided with an inner cavity; the inner barrel 20 is placed in the inner barrel 20; a first stop ring 13 is arranged above the inner cavity; an upper end of the inner barrel 20 extends to an outer side to form a second stop ring 23 matched with the first stop ring 13. The secondary combustion furnace further includes a furnace cover 60. The furnace cover 60 is covered at an upper side of the second stop ring 23. Preferably, the first stop ring 13 is lower than an upper end surface of the outer barrel 10, and forms an outer stop ring 14 (an outer stop wall). The furnace cover 60 is covered in a region encircled by the outer stop ring 14.

Preferably, the furnace cover 60 is provided with an upper-end smoke outlet. The furnace cover 60 is further provided with a smoke guide portion 61 corresponding to the smoke outlet. The smoke guide portion 61 is an upwards retracted guide slope. By the design of the smoke guide portion 61, the air in the combustion cavity flows faster (a flowing channel is narrowed, so that the air flows faster), which achieves a better combustion effect.

Preferably, the supporting legs 50 are arranged on a front end surface of the outer barrel 10 in a retractable manner. Usually, there are three or more supporting legs 50. Due to the retractable design of the supporting legs 50, the supporting legs 50 of the product are convenient to retract, which reduces a height of the product (combustion furnace), thereby reducing a packaging volume and saving the transportation cost.

Further, the adjustable valve 40 is a rotating piece rotatably connected to a lower end surface of the outer barrel 10. The rotating piece is provided with a fourth air inlet hole 42 corresponding to the first air inlet hole 11. The rotating piece is rotated to adjust a size of the first air inlet hole 11 to change an air intake and adjust the combustion speed of the combustibles (firewood) in the inner barrel 20. The rotating piece integrally extends to form a rotating portion 41 convenient for operation with hands. Further, an outer side wall of the outer barrel 10 is connected with a lifting handle 15. The lifting handle 15 may be a circular ring. Preferably, the inner barrel 20, the outer barrel 10, the adjustment valve 40, the supporting legs 50, and the furnace cover 60 can all be made of iron, aluminum, stainless steel, or the like.

The key point of the design of the present disclosure is as follows. First, the ventilation clearance is arranged in the combustion furnace; the air inlet holes communicated with the ventilation clearance are formed above the combustion cavity, thereby achieving secondary combustion of combustibles in the combustion furnace. In the structure of the present disclosure, the combustion furnace also has a heating effect on the air in the ventilation clearance. Meanwhile, due to the adjustment valve, a combustion speed of the combustibles in the combustion furnace can be adjusted. Compared with the prior art, the combustion furnace of the present disclosure has higher combustion efficiency, has a combustion speed adjustment function, and is more suitable for being popularized and used.

Second, the specific design of the adjustment valve, the supporting legs, and the like also further improves the applicability of the combustion furnace of the present disclosure.

The above descriptions are only preferred embodiments of the present disclosure, and do not limit the technical scope of the present disclosure. Therefore, any minor changes, equivalent changes and modifications made to the above embodiments according to the technical essence of the present disclosure still fall within the scope of the technical solutions of the present disclosure. 

What is claimed is:
 1. A secondary combustion furnace with a combustion speed adjustment function, comprising an outer barrel and an inner barrel arranged in the outer barrel; the inner barrel is provided with a combustion cavity; the outer barrel is provided with a first air inlet hole in a lower end surface; a second air inlet hole corresponding to the first air inlet hole is formed in a lower end surface of the inner barrel; a ventilation clearance is reserved between the inner barrel and the outer barrel; a waste tray is arranged on a lower side of the ventilation clearance corresponding to the inner barrel; a plurality of third air inlet holes communicated with the ventilation clearance are arranged above the combustion cavity; an adjustment valve corresponding to the first air inlet hole and used for adjusting a size of the first air inlet hole is arranged at a lower end of the outer barrel; and supporting legs are arranged on a lower end surface of the outer barrel.
 2. The secondary combustion furnace with the combustion speed adjustment function according to claim 1, wherein the outer barrel is provided with an inner cavity; the inner barrel is placed in the outer barrel; a first stop ring is arranged above the inner cavity; an upper end of the inner barrel extends to an outer side to form a second stop ring matched with the first stop ring; the secondary combustion furnace further comprises a furnace cover; and the furnace cover is covered at an upper side of the second stop ring.
 3. The secondary combustion furnace with the combustion speed adjustment function according to claim 2, wherein the first stop ring is lower than an upper end surface of the outer barrel, and forms an outer stop ring; and the furnace cover is covered in a region encircled by the outer stop ring.
 4. The secondary combustion furnace with the combustion speed adjustment function according to claim 3, wherein the furnace cover is provided with an upper-end smoke outlet; the furnace cover is further provided with a smoke guide portion corresponding to the smoke outlet; and the smoke guide portion is an upwards retracted guide slope.
 5. The secondary combustion furnace with the combustion speed adjustment function according to claim 4, wherein the outer barrel and the inner barrel are both cylindrical; and the plurality of third air inlet holes are circumferentially arranged along a circle center of the inner barrel.
 6. The secondary combustion furnace with the combustion speed adjustment function according to claim 3, wherein the supporting legs are arranged on a front end surface of the outer barrel in a retractable manner, and there are three or more supporting legs.
 7. The secondary combustion furnace with the combustion speed adjustment function according to claim 3, wherein the adjustment valve is a rotating piece rotatably connected to the lower end surface of the outer barrel; the rotating piece is provided with a fourth air inlet hole corresponding to the first air inlet hole; and the rotating piece integrally extends to form a rotating portion.
 8. The secondary combustion furnace with the combustion speed adjustment function according to claim 3, wherein an outer side wall of the outer barrel is connected with a lifting handle. 